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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 199 · 40 questions
TalentJR

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

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  1. 1.🧩 Which component limits the current? (a) fuse (b) resistor (c) buzzer (d) transistor
  2. 2.True or false: a buzzer makes a beeping sound. (a) True (b) False
  3. 3.🧩 Which component is a resistance knob? (a) potentiometer (b) buzzer (c) transistor (d) resistor
  4. 4.True or false: a motor makes things spin. (a) False (b) True
  5. 5.What does a motor do? (a) senses how bright it is (b) stores a little charge (c) has coloured bands (d) makes things spin
  6. 6.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  7. 7.True or false: a buzzer is a resistance knob. (a) True (b) False
  8. 8.True or false: a capacitor lets current go one way. (a) True (b) False
  9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  10. 10.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) limits the current (d) has coloured bands
  11. 11.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  12. 12.True or false: a capacitor stores a little charge. (a) True (b) False
  13. 13.What does an LDR do? (a) makes things spin (b) stores a little charge (c) senses how bright it is (d) glows using little power
  14. 14.What does a buzzer do? (a) senses how hot it is (b) is a resistance knob (c) lets current go one way (d) makes a beeping sound
  15. 15.🧩 Which component senses how hot it is? (a) buzzer (b) capacitor (c) potentiometer (d) thermistor
  16. 16.🧩 Which component lets current go one way? (a) buzzer (b) potentiometer (c) diode (d) thermistor
  17. 17.What does an LED do? (a) beeps for an alarm (b) smooths a wobbly supply (c) limits the current (d) glows using little power
  18. 18.🧩 Which component glows using little power? (a) LED (b) thermistor (c) LDR (d) diode
  19. 19.True or false: a motor turns a fan or wheels. (a) True (b) False
  20. 20.True or false: a transistor boosts a small signal. (a) True (b) False
  21. 21.What does a diode do? (a) limits the current (b) blows if current is high (c) lets current go one way (d) turns a fan or wheels
  22. 22.True or false: a diode blows if current is high. (a) True (b) False
  23. 23.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) resistor (d) thermistor
  24. 24.🧩 Which component smooths a wobbly supply? (a) LED (b) fuse (c) capacitor (d) potentiometer
  25. 25.True or false: a thermistor senses how hot it is. (a) False (b) True
  26. 26.True or false: a transistor has coloured bands. (a) True (b) False
  27. 27.What does a buzzer do? (a) has coloured bands (b) blows if current is high (c) senses how hot it is (d) beeps for an alarm
  28. 28.True or false: a motor beeps for an alarm. (a) True (b) False
  29. 29.What does a thermistor do? (a) makes a beeping sound (b) turns a fan or wheels (c) smooths a wobbly supply (d) senses how hot it is
  30. 30.True or false: a resistor glows using little power. (a) True (b) False
  31. 31.🧩 Which component makes things spin? (a) motor (b) LDR (c) diode (d) fuse
  32. 32.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) glows using little power (d) beeps for an alarm
  33. 33.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) thermistor (d) diode
  34. 34.True or false: a capacitor has coloured bands. (a) False (b) True
  35. 35.True or false: a buzzer glows using little power. (a) True (b) False
  36. 36.True or false: a motor senses how hot it is. (a) False (b) True
  37. 37.What does a transistor do? (a) is a resistance knob (b) boosts a small signal (c) glows using little power (d) turns a fan or wheels
  38. 38.True or false: an LDR senses how hot it is. (a) True (b) False
  39. 39.True or false: a resistor has coloured bands. (a) False (b) True
  40. 40.True or false: an LDR smooths a wobbly supply. (a) True (b) False

Answer key

  1. resistor
  2. True
  3. potentiometer
  4. True
  5. makes things spin
  6. a buzzer
  7. False
  8. False
  9. a motor
  10. is a resistance knob
  11. store charge briefly
  12. True
  13. senses how bright it is
  14. makes a beeping sound
  15. thermistor
  16. diode
  17. glows using little power
  18. LED
  19. True
  20. True
  21. lets current go one way
  22. False
  23. LDR
  24. capacitor
  25. True
  26. False
  27. beeps for an alarm
  28. False
  29. senses how hot it is
  30. False
  31. motor
  32. blows if current is high
  33. transistor
  34. False
  35. False
  36. False
  37. boosts a small signal
  38. False
  39. True
  40. False

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